A biological electrode that is attachable to and detachable from clothes, the electrode acquiring a biological signal emitted from the living body in contact with the living body wearing the clothes, and a conductive electrode that is electrically connected to the electrode； An engaging portion that is electrically conductive and detachably engages with an engaging portion provided on the garment, and is electrically connected to the engaging portion when engaged with the engaging portion. And an engaged portion.衣服に対して着脱可能な生体電極であって、前記衣服を着る生体に接触して前記生体が発する生体信号を取得する電極と、導電性を有して前記電極と電気的に接続される被係合部であって、導電性を有して前記衣服に設けられた係合部に着脱可能に係合し、前記係合部に係合したときに前記係合部と電気的に接続される被係合部とを備える。
